AcrossB: The digit product of G across minus one.
E: A palindrome and prime number.
F: A prime number.
G: A prime number.
H: F across - B across.
I: I across divided by the digit sum of E across equals the digit sum of B down plus the digit sum of C down.
J: A cubic number.
K: A prime number.
L: K across multiplied with the digit sum of J across

DownA: A down has the same digit sum as B down, and A down equals H across squared.
B: E across squared.
C: G across squared.
D: F across squared.